Meta tags:
Headings (most frequently used words):
the, via, graveyard, board, of, reviving, apollo, reference, intel, final, for, posts, x86, fr, doc, tb, lab, exhuming, vt5329e, pn133, development, vt5910a, early, c7, unknown, cn900, chipset, autopsy, vt5426d, first, step, to, mini, itx, booting, vt5292a, ple133, resurrecting, vt5182e, mvp4, xpress, resurrection, forgotten, eisa, beast, bong, dat, master, piece, audio, history, limitations, basic, cpu, testers, update, uca, power, supply, overhaul, major, upgrade, dip40, adapter, pagination, recent, categories, archives,
Text of the page (most frequently used words):
the (574), and (194), for (99), with (90), board (79), this (66), via (60), was (60), that (48), intel (46), cpu (45), bus (37), eisa (35), from (34), uca (33), which (29), but (27), one (27), boards (27), #apollo (26), chipset (26), bios (26), chip (23), are (23), more (23), like (23), has (23), were (23), all (22), cpus (22), early (21), development (21), slot (21), supports (20), power (20), reference (20), not (20), pentium (19), first (19), two (19), still (19), pci (19), mhz (19), only (18), southbridge (18), support (17), xpress (17), very (17), also (17), used (17), card (17), analyzer (16), 2026 (16), adapter (16), audio (16), vt5426d (16), some (16), quite (16), socket (16), northbridge (16), now (15), final (15), graveyard (15), between (15), its (15), integrated (15), external (15), had (15), motherboard (15), testers (14), most (14), than (14), both (14), epia (14), pro (14), doc (13), universal (13), part (13), dip40 (13), itx (13), these (13), been (13), standard (13), based (13), end (13), 100 (13), agp (13), test (12), slots (12), have (12), high (12), use (12), while (12), system (12), isa (12), 486 (11), categories (11), vt5292a (11), later (11), memory (11), ple133 (10), mini (10), vt5910a (10), posted (10), author (10), can (10), other (10), here (10), original (10), designed (10), much (10), usb (10), controller (10), rom (10), processor (10), platform (10), graphics (10), commercial (10), form (10), factor (10), capacitors (9), various (9), supply (9), vt5329e (9), common (9), 6502 (9), replaced (9), such (9), data (9), built (9), desktop (9), let (9), igp (9), converter (8), april (8), may (8), 2020 (8), 2024 (8), analysis (8), added (8), testing (8), basic (8), vt5182e (8), cn900 (8), comment (8), what (8), will (8), any (8), motorola (8), available (8), new (8), would (8), because (8), including (8), using (8), voltage (8), revision (8), around (8), same (8), real (8), rather (8), logic (8), find (8), scsi (8), cache (8), core (8), string (8), 370 (8), 2001 (8), acr (8), x86 (7), about (7), hardware (7), leave (7), you (7), they (7), almost (7), out (7), even (7), includes (7), compatible (7), machine (7), evaluation (7), just (7), boot (7), then (7), good (7), full (7), expansion (7), pcb (7), soldered (7), 686b (7), identifier (7), 2002 (7), amr (7), february (6), 2018 (6), january (6), bong (6), reviving (6), mvp4 (6), supported (6), configuration (6), pins (6), newer (6), signals (6), interface (6), components (6), chips (6), features (6), through (6), found (6), bit (6), there (6), few (6), ide (6), cards (6), port (6), performance (6), supporting (6), time (6), vga (6), dx2 (6), announced (6), interesting (6), onboard (6), line (6), trident (6), try (6), similar (6), introduced (6), vt8603 (6), atx2at (5), smart (5), cyrix (5), dat (5), master (5), pn133 (5), next (5), page (5), switch (5), work (5), additional (5), adapters (5), pin (5), required (5), fully (5), advanced (5), less (5), short (5), however (5), functions (5), them (5), tester (5), many (5), nop (5), iii (5), number (5), internal (5), connected (5), fast (5), period (5), unusual (5), rare (5), architecture (5), older (5), especially (5), motherboards (5), low (5), three (5), parity (5), guess (5), 686a (5), ata (5), damage (5), fsb (5), sdram (5), embedded (5), previous (5), 133 (5), small (5), p4m800 (5), 2005 (5), prosavage (5), lab (4), engineering (4), sample (4), amd (4), june (4), 2019 (4), production (4), able (4), major (4), upgrade (4), update (4), piece (4), beast (4), booting (4), step (4), unknown (4), ones (4), custom (4), when (4), basically (4), enough (4), under (4), following (4), without (4), old (4), top (4), processors (4), beta (4), before (4), mode (4), range (4), late (4), module (4), output (4), feature (4), provided (4), could (4), option (4), years (4), functional (4), defective (4), computer (4), ram (4), why (4), address (4), clock (4), systems (4), look (4), signal (4), their (4), condition (4), version (4), after (4), nice (4), tape (4), finally (4), 1742a (4), adds (4), storage (4), single (4), 3com (4), network (4), ethernet (4), networking (4), over (4), qvision (4), 1024 (4), made (4), last (4), became (4), side (4), into (4), back (4), debugging (4), jumper (4), main (4), expected (4), latter (4), dated (4), 2000 (4), year (4), award (4), sale (4), traces (4), settings (4), damaged (4), super (4), 2000s (4), heatsinks (4), vt8251 (4), internally (4), cn700 (4), mobile (4), twister (4), lcd (4), 133a (4), named (4), powered (3), december (3), august (3), october (3), july (3), september (3), 2021 (3), firmware (3), com (3), overhaul (3), limitations (3), history (3), resurrection (3), forgotten (3), resurrecting (3), autopsy (3), exhuming (3), came (3), example (3), different (3), enthusiasts (3), retro (3), mos (3), dip (3), select (3), off (3), soon (3), second (3), dram (3), adjustable (3), setup (3), pth08080w (3), digital (3), control (3), expensive (3), stage (3), cheap (3), limited (3), provides (3), exact (3), write (3), computers (3), being (3), unlike (3), arbitration (3), operations (3), either (3), ebay (3), devices (3), drive (3), display (3), slightly (3), simple (3), important (3), known (3), nothing (3), except (3), couple (3), comments (3), 1999 (3), iconic (3), point (3), 90s (3), today (3), ago (3), note (3), era (3), fan (3), atx (3), make (3), aha (3), feels (3), better (3), another (3), adaptec (3), ordinary (3), mastering (3), servers (3), workstations (3), 3c597 (3), already (3), true (3), pcs (3), family (3), far (3), path (3), did (3), long (3), local (3), bxcpu48650 (3), 486dx (3), large (3), entire (3), fitted (3), originally (3), least (3), pll (3), well (3), physically (3), dedicated (3), modern (3), doesn (3), provide (3), asic (3), series (3), communication (3), deskside (3), server (3), produced (3), 1998 (3), date (3), timeline (3), startup (3), little (3), bulging (3), jumpers (3), brutally (3), probably (3), microatx (3), vt8501 (3), unfortunately (3), related (3), toward (3), looks (3), identical (3), soyo (3), coppermine (3), vt8601a (3), booted (3), missing (3), best (3), 800 (3), removed (3), vt8231 (3), codec (3), eden (3), compact (3), phy (3), difference (3), does (3), third (3), express (3), ddr (3), ddr2 (3), 400 (3), intended (3), name (3), everything (3), monip (2), org (2), memtest86 (2), validator (2), cpc (2), websites (2), projects (2), ultimate (2), die (2), packaging (2), guide (2), guides (2), march (2), november (2), 2022 (2), 2025 (2), electronics (2), 386 (2), 486s (2), 8087 (2), disclosed (2), released (2), overdrive (2), due (2), designing (2), state (2), roms (2), posts (2), search (2), directly (2), should (2), zoom (2), see (2), become (2), vcc (2), gnd (2), need (2), alone (2), box (2), your (2), 6800 (2), rca (2), mcs (2), zilog (2), z80 (2), 8085 (2), way (2), comparison (2), ground (2), those (2), switching (2), complex (2), difficult (2), usable (2), lines (2), add (2), phase (2), critical (2), official (2), release (2), detailed (2), key (2), initially (2), thank (2), website (2), featured (2), wide (2), ideal (2), 300ma (2), quick (2), battery (2), manage (2), ensuring (2), importantly (2), needed (2), highly (2), requested (2), previously (2), delivered (2), ranging (2), alternative (2), possible (2), unit (2), non (2), hole (2), stable (2), fail (2), project (2), schematics (2), relied (2), mounted (2), down (2), reliably (2), tested (2), world (2), contrast (2), issue (2), read (2), eprom (2), actual (2), peripherals (2), purchased (2), pre (2), code (2), leds (2), led (2), feeds (2), allowing (2), how (2), operate (2), instruction (2), addresses (2), onto (2), during (2), certain (2), failed (2), five (2), issues (2), 2006 (2), earlier (2), revisions (2), famous (2), inside (2), content (2), bought (2), decent (2), result (2), according (2), company (2), torn (2), business (2), months (2), looked (2), sound (2), yes (2), 1994 (2), shiny (2), compactflash (2), proprietary (2), installed (2), dos (2), windows (2), right (2), 1990s (2), suits (2), proper (2), build (2), serious (2), link (2), connector (2), floppy (2), marketed (2), solution (2), documentation (2), rates (2), idea (2), meant (2), heavy (2), machines (2), where (2), really (2), rj45 (2), makes (2), mostly (2), home (2), reminder (2), professional (2), compaq (2), video (2), know (2), survived (2), show (2), faster (2), mainly (2), offered (2), technology (2), complete (2), fit (2), overall (2), lived (2), dead (2), reason (2), legendary (2), represents (2), generation (2), special (2), dx4 (2), front (2), designs (2), placed (2), subsystem (2), equipped (2), total (2), running (2), speed (2), infamous (2), bxcpupent66 (2), served (2), documented (2), 1993 (2), fix (2), ejm486cm (2), pba (2), latest (2), cost (2), 486sx (2), accept (2), featuring (2), lucky (2), dallas (2), dimm (2), ecc (2), dimms (2), handles (2), controls (2), dma (2), access (2), integrates (2), manages (2), ras (2), cas (2), flash (2), ports (2), fortunately (2), manufactured (2), chipsets (2), own (2), start (2), larger (2), versions (2), modular (2), somewhere (2), tower (2), rebranded (2), poor (2), clearly (2), availability (2), oddity (2), fixed (2), scratches (2), cut (2), lot (2), selection (2), bad (2), vt82c686a (2), pc66 (2), pc100 (2), uhci (2), bin (2), vt82c686b (2), temperature (2), monitoring (2), 601 (2), 6a6li00ac (2), headers (2), model (2), celeron (2), obviously (2), targeted (2), continue (2), direct (2), successor (2), pc133 (2), blade3d (2), bridge (2), download (2), shares (2), vt6010 (2), ref (2), vt6009 (2), esp (2), proposed (2), 6a6lo009c (2), combined (2), appears (2), assembled (2), usually (2), indeed (2), present (2), case (2), strange (2), specifically (2), specification (2), cnr (2), riser (2), 6a7l6009c (2), vt8237 (2), party (2), several (2), uses (2), cn800 (2), eventually (2), unreleased (2), esther (2), package (2), electrical (2), specific (2), electrically (2), ghz (2), caps (2), cooler (2), thermal (2), leaking (2), connectors (2), cemetery (2), phoenix (2), instead (2), menu (2), panel (2), located (2), purposes (2), modem (2), tualatin (2), savage4 (2), vt8601 (2), proudly, wordpress, customized, boldthemes, 2017, archives, rapidcad, 286, jtag, 80186, 80188, fpus, 487, experimental, postponed, shortage, super386, pga, 386s, benchmarked, drams, benchmark, investigating, ssmec, micro, eproms, epromsdb, vintage, collection, 8008, recent, pagination, cover, obscure, picture, above, positions, marked, users, upload, 6809e, ricoh, 2a03, niche, signetics, 2650, intersil, 6100, vastly, pinouts, compared, everyone, pinball, researchers, 6510, mos6509, tbd, opinion, 6809, 6802, 6801, progress, cdp1802, cosmac, 8051, 80c48, national, semiconductor, nsc800, 8086, 8088, happy, announce, 70s, 80s, versus, extra, necessary, configurations, differ, technically, keep, simultaneously, frequency, transistors, parasitic, noise, switched, entering, thanks, valuable, feedback, talented, professionals, passionate, improvements, identified, addressed, improvement, concerns, coming, enhancement, involves, patience, challenge, resolved, updating, opening, preorders, weeks, functionalities, ability, voltages, 45v, current, capability, bench, demanding, draw, ics, overcurrent, circuit, protections, place, allow, perfect, portable, field, pack, automatically, selected, modes, discrete, complemented, circuitry, diode, input, seamless, protection, event, failure, implement, mandatory, addition, cases, consume, strong, delivers, request, costing, per, additionally, component, complicates, assembly, increases, costs, reflow, safe, challenging, aspects, reluctant, touch, texas, instruments, upside, excellent, performs, significant, drawbacks, fails, highlights, weakness, assess, set, sometimes, failing, detect, faults, cause, failures, thorough, genuinely, operating, conditions, passing, superficial, click, helped, pinpoint, 6502s, stuck, rendered, unusable, yet, appeared, despite, sophisticated, fall, replicating, environment, relies, extensive, beyond, instance, ready, irq, nmi, sync, derived, ignore, adequately, evaluate, comprehensively, every, accurately, simulating, stack, interrupts, essential, incorporate, containing, programmed, 74hct245, transceivers, a15, 74hct574, flip, flop, moving, dot, pattern, instructions, circuitsurgery, understand, happens, readily, marketplaces, simplest, type, often, generated, oscillator, ne555, timer, permanently, operation, instructing, cycle, indefinitely, represented, 0xea, binary, 1110, 1010, hardwired, increments, smoothly, continuously, indicated, displaying, changing, values, considered, noticed, appearing, determine, whether, discrepancy, flaw, simpler, flagged, passed, verify, apple, iie, prompting, analyze, behavior, further, isn, personally, sounds, dynamic, ear, listen, dozens, seconds, calibration, tone, female, voice, says, followed, treasure, corporation, iipc5100, signature, worldwide, https, uploads, img, 6105, 1080p, mp4, promptly, began, hunt, player, locally, stuff, pricey, refurbished, sony, dtc, 790, price, seller, post, 360, worked, label, details, readable, identification, iipcxxxx, along, ids, 00123528, across, gem, studio, copy, jingle, composed, since, starting, 1996, walter, werzowa, loud, noctua, swapped, fsp, 350w, happily, handled, 10a, rail, load, blaster, noisy, painfully, slow, 270, quantum, prodrive, lps, hard, bootable, loaded, configured, utility, files, workgroups, list, runs, doom, absolutely, oversized, overbuilt, exactly, sort, premium, expect, things, plextor, 20x, perfectly, costly, behemoth, length, height, host, ended, seven, hd50, plus, header, itself, quotes, burst, transfer, gives, kind, duty, mattered, 10base, 100base, twisted, pair, cable, mbit, etherlink, optional, environments, completely, correct, capable, raw, brooktree, bt484, ramdac, sc02sh007dk04, datasheet, benchmarks, tseng, labs, et4000, reaches, matrox, millennium, impressive, finding, saved, extended, industry, attempts, improve, ibm, desktops, wider, biggest, advantages, stayed, existing, transitional, break, past, compete, vesa, vlb, attractive, overshadowed, practical, keeping, easier, therefore, terms, precisely, pushed, edge, doubling, cleaner, pedigree, historically, fitting, choice, definitely, stay, confused, slower, among, always, reputation, reached, higher, speeds, multiplication, ran, aggressive, ever, put, 1991, never, mainstream, pushing, demands, 82496, eight, 82491, sram, 256, wait, states, truly, art, stepping, means, affected, fdiv, bug, managed, 614023, 006, leading, launch, purpose, interposer, massive, raise, crude, minute, run, proved, unstable, overheating, problem, worse, allowed, bxcpu486sx25, 540363, 210, affordable, comes, empty, zif, virtually, volt, quartz, oscillators, choose, 128, user, tag, rams, covering, nearly, dual, smp, daughter, course, ds1287, rtc, cmos, depleted, ds12887, luckily, socketed, stick, x36, alongside, ebc, 82358dt, translates, commands, cycles, steering, isp, 82357, channels, timers, interrupt, controllers, refresh, ebb, buffer, 82352, physical, buffering, latching, reliable, transfers, peripheral, meca, 82356cs, links, arbitrates, masters, decoding, snooping, 82356ds, timing, addressing, generating, handling, multiplexed, dpp, 82353ds, checking, clasic, 82351ds, takes, care, serial, parallel, mouse, parts, log, identify, detail, 519610, 004, sticker, indicates, distinct, divide, coherency, separate, slotused, xbase6te8f, chassis, finished, restoring, share, pictures, wonderful, ingredients, catch, eye, design, unique, nowhere, else, launched, 1992, discontinued, 1995, product, sat, personal, workstation, expandable, networked, tanks, models, netserver, germany, deserved, love, vt5182e_bios, engraved, codes, plls, eeprom, mosfets, etc, ww23, coincides, bugs, adding, displays, corrupted, image, resoldering, solved, vp4, 686, 2a5le00dc, r34, 5182, lacks, withonly, 124, multiplier, vcore, umc, um616464af, 512, rework, near, jack, tht, resistors, manhattan, style, glued, together, big, messy, blob, dirty, engineer, mii, idt, winchip, others, fpm, edo, cyberblade, shared, remaining, facilities, closed, doors, save, bunch, salvage, sockets, 423, prepared, waste, ripped, roughly, tossed, causing, pcbs, get, working, repairing, suffered, documenting, findings, vt5292a_bios, options, rest, sensor, thermocouple, positioned, behind, evolutionary, check, 2798a72, mainboard, location, simply, 7vem, arrived, clean, visually, undocumented, took, figure, requires, types, setting, c3s, formerly, modules, upgraded, vt5426d_bios, bingo, immediately, logo, odd, ultimately, crazy, happen, flashed, considering, kept, inherited, 5000, fangless, success, cebit, decided, shrink, gradually, shrank, ambitious, obvious, hint, nature, push, legacy, mbedded, latform, nnovative, rchitecture, manufacturing, bioses, updated, frequently, term, mentions, silkscreen, 601a0115, 8231, hell, produce, lacking, investigation, promise, won, fine, mac, debug, carry, match, developed, interest, group, founded, companies, ali, conexant, lucent, multimedia, software, modems, lan, broadband, wireless, relying, practice, quickly, phased, sight, areas, vrms, notice, lack, reversed, shifted, rear, analyzed, vt5910a_bios, pairing, asus, p5vdc, star, p5m8pro, msi, 7104, bootup, cc591015, p4m800pro, 823, menus, suppliers, tied, aging, lacked, technologies, 2003, 2004, sata, combining, unichrome, 667, uncommon, sense, generations, switches, extreme, aspect, cn400, public, adapted, vt3344, dropped, favor, preliminary, changed, connects, effective, commonly, specified, 533, depending, although, mechanically, 479, ecosystem, agtl, quad, pumped, qdr, signaling, implementation, integration, avoid, legal, linked, unannounced, c5j, microprocessor, centaur, fabricated, process, targets, efficiency, implements, simd, extensions, sse3, padlock, security, engine, assisted, take, closer, actually, size, mid, clocked, nanobga2, cpuid, 0x6a9, mass, come, until, published, review, secret, replacing, brand, rubycon, suitable, replacement, mounting, spacing, reassembled, fresh, paste, repaired, shorted, traced, decoupling, visibly, received, fairly, sides, bent, grease, spread, everywhere, initial, cleaning, liked, couldn, information, greeted, usual, surprising, laptop, strings, include, resale, via686a, 12669r01, 101, edit, bring, flipping, device, default, auto, outputs, strangely, formatted, resulting, scrambled, resembles, white, extension, translators, nearby, breaks, vt1611a, counterpart, circa, close, differences, ata100, udma, smbus, seems, clear, accompanied, minor, norhtbridge, exclusively, sffs, shuttle, barebone, elusive, laptops, 2010s, pn133t, vt8606, pm133, vt8605, stripped, cheaper, value, segment, pl133, vt8604, pro133a, panels, saving, capabilities, contraction, connect, blade, vt8601t, ple133t, vt8602, promedia, pm601, graphic, officially, summarize, lineup, confusing, numerous, renamings, rebrandings, northbridges, vt82c693a, vt82c694x, significantly, conventional, confirmed, placement, jacks, aligned, prevent, properly, validate, serve, basis, primarily, leaves, doubt, skip,
Text of the page (random words):
s are still unknown what benchmarks do show however is that the qvision 1024 e is much faster than its isa version qvision 1024 i it is also faster than a good isa card based on the tseng labs et4000 and under dos it reaches about 80 of the performance of a matrox millennium pci which is very impressive for an eisa graphics card 3com 3c597 tx eisa fast ethernet 100 mb s next one is a 3com 3c597 tx network card it is an eisa fast ethernet adapter with a standard rj45 port supporting both 10base t and 100base tx networking over twisted pair cable that already makes it a rather unusual card for a machine like this because true 100 mbit s ethernet was still a high end feature at the time and was mostly found in serious workstations and servers rather than ordinary desktop pcs the 3c597 tx is a 32 bit eisa card and 3com marketed it as part of its fast etherlink family with bus mastering support and an optional boot rom for network boot environments in a system like the intel xpress it feels completely at home period correct very capable and a good reminder that this platform was designed for professional networking as much as raw cpu performance adaptec aha 1742a scsi eisa and then the behemoth of eisa cards the adaptec aha 1742a this is a full length full height eisa to fast scsi host adapter built for serious storage hardware rather than ordinary desktop use the card is a 32 bit bus mastering controller designed to link the eisa bus to single ended fast scsi and it supports up to seven scsi devices on the bus it also includes both an internal 50 pin scsi connector and an external hd50 port plus a floppy controller header on the card itself adaptec marketed the 1742a as a high performance solution and period documentation quotes eisa burst transfer rates up to 33 mb s which gives a good idea of the kind of system this card was meant for servers workstations and other heavy duty machines where storage performance really mattered in a machine like the intel xpress the aha 1742a feels absolutely right it is oversized overbuilt and exactly the sort of premium expansion card you would expect to find in a high end eisa system from the early 1990s to make things even better i connected it to a plextor 12 20x cd rom drive which suits the platform perfectly and adds another proper piece of costly high end hardware to the build i then replaced the loud 80 mm fan with a noctua nf a8 swapped the original at power supply for an fsp 350w atx unit connected through an atx2at smart converter v2 which happily handled the 10a required on the 5v rail at full load added a sound blaster 16 and finally replaced the noisy painfully slow 270 mb quantum prodrive lps hard drive with a shiny 4 gb compactflash card connected to the motherboard s ide interface to make the compactflash card bootable i added an isa rom card loaded with the xt ide firmware after that i configured all the eisa cards using the proprietary setup utility and configuration files then installed ms dos 6 22 and windows for workgroups 3 11 windows nt 3 51 is next on the list and yes it runs doom author doc tb posted on 2026 04 06 categories various 1 comment on intel xpress resurrection reviving a forgotten eisa beast intel bong dat master a piece of audio history a few months ago i came across what looked like a real gem on ebay us a studio copy of intel s iconic bong sound yes the famous 5 note jingle composed by walter werzowa in 1994 and used by intel since the pentium ii era starting in 1996 according to the seller the tape is a digital dat digital audio tape master from the post production company point 360 still in business today which worked with intel in the 90s the label on the tape had been torn but some details are still readable an intel internal identification number iipcxxxx along with other ids wo 00123528 gr 100 i promptly bought it and then began the hunt for a decent dat player locally that stuff is still pricey in the end i found a refurbished sony dtc 790 at a good price so i could test the tape here s the result https x86 fr wp content uploads 2026 02 img 6105 1080p mp4 after about 20 seconds of the standard calibration tone a female voice says this is for intel corporation id number iipc5100 audio signature id for the intel inside pentium iii processor for worldwide use followed by the famous bong what a nice treasure this isn t the very first version used for the pentium ii but the second revision used from 1999 to 2006 for the pentium iii and pentium 4 personally i find this version the most iconic the earlier one sounds much less dynamic to my ear you can listen to all the revisions of the bong there are dozens on this website author doc tb posted on 2026 02 01 2026 02 01 categories various 4 comments on intel bong dat master a piece of audio history the limitations of basic cpu testers during the beta testing phase of the universal chip analyzer uca some testers noticed that certain cpus failed on the uca while appearing to work on more basic testing devices to determine whether this discrepancy was due to a flaw in the uca i purchased a couple of these simpler testers for comparison out of five 6502 cpus that the uca had flagged as defective two passed without any issues on the basic testers to verify their actual condition i tested them in a real apple iie both failed to boot the system prompting me to analyze their behavior further using a logic analyzer to understand why this happens it s important to look at how common cpu testers readily available on ebay and other marketplaces operate the simplest type known as a nop tester provides a basic clock signal often generated by a simple oscillator such as a ne555 timer it permanently feeds a nop no operation instruction to the cpu s data bus instructing it to do nothing except cycle through all addresses indefinitely in a 6502 the nop instruction is represented by 0xea in binary 1110 1010 which is hardwired onto the data bus if the address bus increments smoothly and continuously indicated by leds displaying changing values the cpu is considered functional 6502 nop tester from circuitsurgery com more advanced testers like the ones i purchased incorporate an eprom containing pre programmed test code these devices use 74hct245 bus transceivers to drive leds that display the 16 bit address bus a0 a15 and a 74hct574 flip flop to control an 8 led moving dot pattern on the data bus the rom feeds instructions to the cpu allowing for slightly more complex testing than a simple nop tester 6502 rom tester from ebay however despite being more sophisticated eprom based testers still fall short of replicating a real computer environment unlike a basic tester an actual computer relies on ram external peripherals and extensive arbitration logic to manage operations this is why cpus have so many additional pins beyond just data and address lines for instance the 6502 includes bus arbitration signals like ready irq nmi read write sync so and derived clock signals ø1 and ø2 most cheap testers either ignore or fail to adequately evaluate these critical signals in contrast the uca is designed to comprehensively test every cpu pin accurately simulating rom ram stack operations interrupts and other essential functions found in real world systems the logic analyzer helped pinpoint the exact issue the r w read write pin on the two defective 6502s was stuck high logic 1 this rendered them unusable in real computers and on the uca yet they still appeared functional on the basic testers defective 6502 on logic analyzer click to zoom this highlights the key weakness of cheap cpu testers they only assess a limited set of cpu functions sometimes failing to detect faults that would cause real world failures the uca by contrast provides a much more thorough evaluation ensuring cpus are genuinely functional under real operating conditions rather than just passing a superficial test same 6502 fails while tested on the uca author doc tb posted on 2025 02 03 categories universal chip analyzer leave a comment on the limitations of basic cpu testers final update for the uca power supply overhaul designing a stable adjustable and fail safe power supply for the universal chip analyzer has been one of the most challenging aspects of this project and i was quite reluctant to touch that part of the schematics for years the dc dc power supply stage on the uca interface board relied on texas instruments pth08080w module mounted upside down while this module is excellent and performs reliably it has two significant drawbacks first it s expensive costing around 8 9 per unit additionally as a non standard through hole component it complicates assembly and increases costs when using a reflow machine more importantly the pth08080w module needed to be replaced to implement a highly requested feature from beta testers previously a 9v external power supply was mandatory in addition to the 5v provided by the usb c to power the uca interface board that external power supply powered the dc dc converter which delivered an adjustable output voltage ranging from 2 8v to 5 5v at up to 2a however in some cases such as testing 5v only cpus that consume less than 300ma the voltage provided by usb c alone could be strong enough beta testers requested an alternative power option to use only usb c power when it s possible and this final revision delivers on that request the pth08080w module has been replaced with a discrete dc dc converter complemented by additional circuitry for digital control of the voltage output an ideal diode controller has also been integrated to manage the usb c 5v input ensuring seamless switching and protection in the event of a failure the universal chip analyzer now features two automatically selected power modes usb c only no external power in this mode the uca can test 5v chips that draw less than 300ma this includes for example all dip40 ics overcurrent and short circuit protections are still in place but the uca will only allow this mode for compatible adapters this setup is perfect for quick portable testing in the field using a usb battery pack usb c with 9v external power this fully featured mode supports all uca functionalities including the ability to test a wide range of components from early dram to late 5 86 chips adjustable voltages e g 3 3v 3 45v are supported with high current capability up to 2a this mode is ideal for advanced bench analysis and testing of more demanding components with this final challenge resolved i ll be updating the uca website and opening preorders in two weeks thank you all for your patience and support author doc tb posted on 2024 12 23 2024 12 23 categories electronics universal chip analyzer leave a comment on final update for the uca power supply overhaul major upgrade for the final dip40 adapter the universal chip analyzer uca beta testing is entering its final phase thanks to the valuable feedback from talented professionals and passionate retro enthusiasts two critical improvements were identified and addressed before the official release the first improvement concerns the interface board and a detailed update is coming soon the second key enhancement involves the dip40 adapter which initially required additional top adapters to test common cpus like the zilog z80 motorola 6800 and mos 6502 these extra adapters were necessary because the power and ground pin configurations of these processors differ from those of intel s 8085 86 88 for which the original dip40 adapter was designed switching vcc and gnd to other pins is technically not very complex but it s much more difficult to keep these pins simultaneously usable by high frequency signals the transistors required to switch power lines add various parasitic noise to the pins even when they re switched off i m happy to announce that the final dip40 adapter is now able to test the most common dip40 cpus from the 70s and 80s out of the box without the need for any additional adapters here is a comparison of the old dip40 adapter with some of its various top adapters versus the newer all integrated one the dip40 adapter has a 4 way dip switch to select the cpu under test between the following intel 8086 8088 intel 8085 zilog z80 national semiconductor nsc800 mcs 48 80c48 mcs 51 8051 rca cdp1802 cosmac intel 8087 work in progress motorola 6800 motorola 6801 motorola 6802 motorola 6809 mos 6502 mos 6510 or mos6509 still tbd would like your opinion all these cpus are now supported by the dip40 adapter directly this should cover 95 of the most common cpus that came in dip40 what about more obscure ones if you zoom in on the picture above you can see that two positions of the configuration switch are marked custom 1 and custom 2 users will be able to upload any other firmware to these two slots for example cpus like the motorola 6809e or the ricoh 2a03 can be added in the custom slots when they become available basically any cpu with vcc on pins 5 6 7 8 11 and or 40 and gnd on pins 1 20 21 and or 29 can be supported some niche cpus like the signetics 2650 or the intersil 6100 which have vastly different pinouts compared to all other cpus will still need a custom adapter but the new dip40 adapter alone should be enough for almost everyone out of the box from pinball enthusiasts to retro researchers author doc tb posted on 2024 12 10 categories universal chip analyzer leave a comment on major upgrade for the final dip40 adapter posts pagination page 1 page 2 page 7 next page search for search recent posts via s graveyard exhuming the vt5329e pn133 development board via s graveyard reviving the vt5910a early c7 m unknown cn900 chipset via s graveyard autopsy of the vt5426d first step to mini itx via s graveyard booting the vt5292a apollo ple133 reference board via s graveyard resurrecting the vt5182e apollo mvp4 reference board intel xpress resurrection reviving a forgotten eisa beast intel bong dat master a piece of audio history the limitations of basic cpu testers final update for the uca power supply overhaul major upgrade for the final dip40 adapter the uca now supports intel 8008 epromsdb com the vintage roms collection the uca now supports roms e eproms investigating ssmec s state micro 486s with the uca designing a benchmark for the uca part 1 final universal chip analyzer disclosed uca now able to test early drams all pga 386s benchmarked with the uca the uca now supports c t super386 uca production postponed due to ic shortage experimental pentium overdrive testing with the uca atx2at smart converter firmware 1 21 released universal chip analyzer v2 disclosed the uca now supports intel 487 sx the uca now supports 8087 fpus the uca now supports intel 80186 80188 jtag support added to the uca 486 adapter the universal chip analyzer now supports intel 286 the uca 386 adapter supports ti cyrix 486s the uca 386 adapter now supports intel rapidcad categories atx2at smart converter 4 electronics 3 ic analysis 8 mb analysis 5 universal chip a...
|
